HENRY, George. Showcasing Africa’s wonderful and varied geoheritage. South African Journal of Science, [S. l.], v. 113, n. 3/4, p. 1, 2017. DOI: 10.17159/sajs.2017/a00196. Disponível em: https://sajs.co.za/article/view/3651. Acesso em: 2 may. 2024.